Atresia is a condition in which a body orifice or passage in the body is abnormally closed or absent.
Examples of atresia include:
- Imperforate anus - malformation of the opening between the rectum and anus.
- Microtia- Absence of the ear canal or failure of the canal to be tubular or fully formed (can be related to Microtia- a congenital deformity of the pinna (outer ear).)
- Biliary atresia - Condition in newborns in which the common bile duct between the liver and the small intestine is blocked or absent.
- Choanal atresia - blockage of the back of the nasal passage, usually by abnormal bony or soft tissue.
- Esophageal atresia - affects the alimentary tract causing the esophagus to end before connecting normally to the stomach.
- Intestinal atresia - malformation of the intestine, usually resulting from a vascular accident in utero
- Ovarian follicle atresia, atresia refers to the degeneration and subsequent resorption of one or more immature ovarian follicles.
- Pulmonary atresia - malformation of the pulmonary valve in which the valve orifice fails to develop.
- Tricuspid atresia - a form of congenital heart disease whereby there is a complete absence of the tricuspid valve. Therefore, there is an absence of right atrioventricular connection.
- Vaginal atresia - congenital occlusion of the vagina or subsequent adhesion of the walls of the vagina, resulting in its occlusion.
- Potter sequence - congenital decreased size of the kidney leading absolute no functionality of the kidney, usually related to a single kidney.
- Kaneshiro, Neil. "Imperforate Anus". PubMed Health. Retrieved 11 September 2012.
- Bonilla, Arthuro. "Microtia: Congenital ear deformity Institute". Congenital ear deformity Institute. Retrieved 11 September 2012.
- Zieve, David. "Biliary atresia". PubMed Health. Retrieved 11 September 2012.
- Zieve, David. "Choanal atresia". Pubmed Health. Retrieved 11 September 2012.
- Dugdale, David. "Esophageal atresia". PubMed Health. Retrieved 11 September 2012.
- "Intestinal atresia". Pedisurg. Retrieved 11 September 2012.
- Kaipia, A.; Hsueh, A. J. W. (1997). "Regulation of Ovarian Follicle Atresia". Annual Review of Physiology 59: 349–363.
- Schumacher, Kurt. "Pulmonary atresia". PubMed Health. Retrieved 11 September 2012.
- "Tricuspid atresia". PubMed Health. Retrieved 11 September 2012.